Use "trap - 0" rather than the unportable "trap 0".

[bison.git] / README

diff --git a/README b/README
index d8b45ccf045d032291a6a469142c719de0ed8cd3..42066f1494bcc5d3cc01ad9e61569eab80e3e0bd 100644 (file)
--- a/README
+++ b/README
@@ -3,11 +3,12 @@ This directory contains the Bison parser generator.
 See the file INSTALL for generic compilation and installation instructions.
 See the file doc/FAQ for frequently asked questions.
 
-Bison requires GNU m4 1.4 (or later, if a later version of GNU m4
-becomes available).  The following m4 patches are recommended:
+Bison requires GNU m4 1.4 or later.  Vanilla GNU m4 1.4 has some
+serious bugs, so we recommend using m4 1.4 as patched by the standard
+GNU/Linux distributions.  If you're building GNU m4 1.4 from scratch
+we suggest using this version:
 
-http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=92629
-http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=211477
+ftp://ftp.gnu.org/gnu/m4/m4-1.4.2.tar.gz
 
 Older versions of Sun Forte Developer 6 update 2 have a compiler bug
 that cause "make check" to fail with a "Encounter BINCL entry"